How to include Oauth2 auth urls in Swagger?

I use Django drf-spectacular OAuth Toolkit for an Oauth2 password flow. Unfortunately, Swagger doesn't recognize the auth URLs. This is my urls.py

urlpatterns = [

# schema
path("api/schema/", SpectacularAPIView.as_view(api_version='v1'), name="schema"),
path(
    "api/schema/swagger/",
    SpectacularSwaggerView.as_view(url_name="schema"),
    name="swagger-ui",
),
path(
    "api/schema/redoc/",
    SpectacularRedocView.as_view(url_name="schema"),
    name="redoc",
),
path("api/oauth/", include("apps.main.oauth.urls", namespace="oauth2_provider")),
]

How can I fix thit?

To make it available to swagger you have to override the Oauth API, for example, override the token API and and write an inline serializer in the @extend_schema and pass the post method.

from drf_spectacular.utils import extend_schema, inline_serializer
from oauth2_provider.views.application import TokenView

class TokenApiView(TokenView, APIView):

@extend_schema(
    request=inline_serializer(
        name="InlineTokenSerializer",
        fields={
            "username": serializers.CharField(),
            "password": serializers.CharField(),
            "grant_type": serializers.CharField(required=False),
            "Scope": serializers.CharField(required=False),
            "client_id": serializers.CharField(),
        },
    )
)
def post(self, request, *args, **kwargs):
    return super().post(request, *args, **kwargs)